Even if you take childhood mortality into account, during paleontological times, most people still didn’t live into their z0’s or 80’s.
You were considered pretty old if you made it to 60. Just look at the primitive tribes today to see that this is true.
The specifics of this diet really boil down to:
1) Eat fresh meat, fruit, nuts, and vegetables
2) Avoid processed and unnatural foods
All the hoopla aside, I don’t see how that isn’t a formula for being healthy.